Stenosemus simplicissimus (Thiele, 1906:335)



Taxonomy & Nomenclature



Conservation Status

Last (and only) record: 1906 or before (Schwabe, 2008 [by implication])

Rediscovered (Gutt et al., 2000 fide Schwabe, 2008) on 3 April 2000 (Schwabe, 2008) or ealier


Distribution & Habitat

Cape of Good Hope & Southern Ocean

Type locality: "South Africa, Cape of Good Hope, Deutsche Tiefsee-Expedition St. 113: 34°33.3'S 18°21.2'E, 318 m" (Schwabe, 2008:72)


Anatomy & Morphology



Biology & Ecology




Holotype: ZMB Moll 59908 (partly disarticulated) (Schwabe, 2008:72)






Original scientific description:

Thiele, J. (1906). Über die Chitonen der deutschen Tiefsee-Expedition. Wiss. Ergebn. dt. Tiefsee Exp. 9 (2): 325-336, pl. 29.


Other references:

Barnard, K. H. (1974). Contributions to the knowledge of South African marine Mollusca. Part VII. Revised fauna list. Annals of the South African Museum 47: 663-781.

Gutt, E., Sirenko, B. I., Arntz, W. E., Smirnov, I. S. and De Broyer, C. (2000). Biodiversity of the Weddell Sea: Macrozoobenthic species (demersal fish included) sampled during the expedition ANT XIII/3 (EASIZ I) with RV “Polarstern”. Berichte zur Polarforschung 372: 1-103.

Kaas, P. and Van Belle, R. A. (1980). Catalogue of Living Chitons (Mollusca: Polyplacophora). Dr. W. Backhuys Publisher, Rotterdam.

Kaas, P. and Van Belle, R. A. (1990). Monograph of Living Chitons (Mollusca: Polyplacophora). 4, Suborder Ischnochitonina: Ischnochitonidae: Ischnochitoninae (continued). Additions to vols 1, 2 and 3. E. J. Brill, Leiden, The Netherlands.

Kaas, P. and Van Belle, R. A. (1998). Catalogue of Living Chitons (Mollusca, Polyplacophora). 2nd, revised edition. Backhyus Publishers, Leiden, The Netherlands.

Kilias, R. (1995). Polyplacophora-Typen und -Typoide (Mollusca) im Zoologischen Museum in Berlin. Mitteilungen aus dem Zoologischen Museum in Berlin 71: 155-170.

Linse, K., Schwabe, Enrico and Brandt, A. (2006). Mollusca collected during ANDEEP III - preliminary results. Berichte zur Polarund Meeresforschung 533: 151-160.

MolluscaBase eds. (2024). MolluscaBase. Stenosemus simplicissimus (Thiele, 1906). Accessed through: World Register of Marine Species at: on 2024-02-17

Schwabe, Enrico. (2008). Discovery of the South African polyplacophoran Stenosemus simplicissimus (Thiele, 1906) (Mollusca, Polyplacophora, Ischnochitonidae) in the Southern Ocean. American Malacological Bulletin 24(1): 71-77.

Sirenko, B. I. (1994). Chitons (Polyplacophora) of the continental slope of the Kurile Islands with a brief review of deep water species of the Russian Seas. Russian Academy of Sciences Zoological Institute, Explorations of the Fauna of the Seas 46: 159-174.

Sirenko, B. I. (2005). Unusual concentration of endemics of chitons (Polyplacophora) in bathyal zone near New Caledonia. In: Poster Abstracts of the IV. International Congress of the European Malacological Societies, Oct. 10-14. 2005 in Naples (Italy). Notiziario S.I.M., Supplemento al Bollettino Malacologico year 23: 36.

Sirenko, B. (2023). A small collection of rare and new chitons (Mollusca: Polyplacophora) from the Tasmanian Museum and Art Gallery. Zootaxa. 5325(3): 359-392 [381].


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